Frame sealing glue printing roller, frame sealing glue printing device and packaging system

Abstract

The utility model discloses a frame sealing glue printing roller, a frame sealing glue printing device and a packaging system, and relates to the technical field of display. The frame sealing glue printing roller comprises a roller body and a plurality of glue dipping blocks; the glue dipping block is convexly arranged on the periphery of the roller body; the glue dipping block is in a full-surrounding shape; the glue dipping block is used for dipping frame sealing glue and printing the frame sealing glue on a substrate; wherein a plurality of light-emitting units are arranged on the substrate; the frame sealing glue printed on the substrate forms a dam surrounding body to surround the corresponding light-emitting units. According to the technical scheme, the forming efficiency of the dam body can be improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a frame sealing adhesive printing roller, a frame sealing adhesive printing device and a packaging system. Background Art

[0002] A common micro display generally includes a light-emitting motherboard and a packaging layer. The light-emitting motherboard includes a substrate and a light-emitting unit disposed on the substrate. The packaging layer covers the substrate to package the light-emitting unit.

[0003] OLED is a display lighting technology that has gradually developed in recent years. Especially in the display industry, it is used as the light-emitting unit in micro displays due to its advantages such as high response, high contrast, and flexibility. However, since OLED devices are prone to corrosion and damage under the action of water vapor and oxygen, it is particularly important to choose an appropriate packaging method to form the corresponding packaging layer.

[0004] At present, the commonly used packaging methods of light-emitting units include sheet glue packaging, glass glue packaging, dam-type filling packaging, etc. Among them, the packaging layer formed by the dam-type filling packaging method includes a dam body, a light-transmitting layer and a glass cover plate. After the light-emitting unit is packaged, the dam body is arranged around the periphery of the light-emitting unit, the light-transmitting layer is located inside the dam body and covers the light-emitting unit, and the glass cover plate covers the dam body and the light-transmitting layer. Among them, the dam body is formed by a sealing glue (Dam), and the light-transmitting layer is formed by a filling glue (Fill), and the filling glue is commonly an optical glue. The dam-type filling packaging method has good water and oxygen blocking effect, simple production process, and can be applied to large-size device packaging and other characteristics, and is deeply favored.

[0005] like Figure 1-Figure 2 As shown, in the common dam-type filling packaging method, a dispensing needle 11 is generally used to apply a sealing glue (not shown) along the outer periphery of the corresponding light-emitting unit 13 on the substrate 12 to form a dam body 14 surrounding the light-emitting unit 13, resulting in low molding efficiency of the dam body 14.

[0006] Therefore, how to improve the forming efficiency of the dam body is still a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0007] In view of this, in order to solve the above technical problems, the present application provides a frame sealing glue printing roller, a frame sealing glue printing device and a packaging system.

[0008] In order to solve the above technical problems, one of the technical solutions adopted in the present application is to provide a frame sealant printing roller, which includes a roller body and a plurality of dipping glue blocks. The dipping glue blocks are protrudingly arranged on the periphery of the roller body; the dipping glue blocks are in a fully enclosed shape. The dipping glue blocks are used to dip the frame sealant and print the frame sealant on the substrate. Among them, a plurality of light-emitting units are arranged on the substrate. The frame sealant printed on the substrate forms a dam body to surround the corresponding light-emitting units.

[0009] In order to solve the above technical problems, another technical solution adopted by the present application is to provide a frame sealant printing device, characterized in that the frame sealant printing device comprises:

[0010] A support platform, used for supporting a substrate, on which a plurality of light-emitting units are arranged;

[0011] And a sealing glue printing roller, the sealing glue printing roller is the above-mentioned sealing glue printing roller, and the sealing glue printing roller is used to print the sealing glue on the substrate to form a dam body on the substrate to surround the corresponding light-emitting unit.

[0012] In order to solve the above technical problems, another technical solution adopted by the present application is to provide a packaging system, which is used to package the light-emitting unit of the micro display, and the packaging system includes a conveying device, a sealant printing device, an optical glue injection device and a capping device. The sealant printing device is the above-mentioned sealant printing device.

[0013] The conveying device is used to convey the substrate to the workstations corresponding to the sealant printing device, the optical glue injection device and the capping device respectively, and a plurality of light-emitting units are arranged on the substrate. Among them, the sealant printing device is used to print the sealant on the substrate to form a dam body on the substrate to surround the corresponding light-emitting unit; the optical glue injection device is used to inject the optical glue into the inner side of the dam body to form a light-transmitting layer covering the light-emitting unit on the inner side of the dam body; the capping device is used to obtain the glass cover plate and cover the glass cover plate on the substrate to cover the dam body and the light-transmitting layer.

[0014] Beneficial effect: Different from the prior art, in the technical solution of the present application, the roller body is used to drive the glue dipping block to roll the substrate, and the frame sealing glue dipped on the glue dipping block can be transferred to the substrate to form a corresponding dam body to surround the corresponding light-emitting unit. In this way, compared with the line coating method, the frame sealing glue can be applied to the substrate at a faster rate to form a corresponding dam body by using multiple glue dipping blocks on the roller body for relief printing, thereby improving the molding efficiency of the dam body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the scene of marking and coating the dam body in the prior art;

[0016] Figure 2 yes Figure 1 Schematic diagram of the dam body formed after the single light-emitting unit is crossed and coated;

[0017] Figure 3 It is a schematic diagram of the structure of the packaging system of the present application;

[0018] Figure 4 This is a schematic diagram of a scene from a main viewing angle of relief printing of a frame sealant printing device of the packaging system of the present application;

[0019] Figure 5 It is a structural schematic diagram of the frame sealant printing roller of the packaging system of the present application;

[0020] Figure 6 This is a schematic diagram of a scene from another perspective of relief printing of a frame sealant printing device of the packaging system of the present application;

[0021] Figure 7 yes Figure 6 A schematic diagram of a dam body formed by relief printing of a single light-emitting unit;

[0022] Figure 8 is a schematic diagram of a scene in which an optical glue injection device of the packaging system of the present application injects optical glue into the inner side of the dam body;

[0023] Fig. 9 yes Figure 8 Schematic diagram of the light-transmitting layer formed after a single light-emitting unit is injected with optical glue;

[0024] Fig.10 It is a schematic diagram of a scene in which the optical covering device of the packaging system of the present application covers a glass cover plate on a substrate.

[0025] Description of reference numerals:

[0026] Glue dispensing needle 11; substrate 12; light-emitting unit 13; dam body 14; packaging system 20; conveying device 100; frame glue printing device 200; optical glue injection device 300; glue dispensing needle 310; capping device 400; substrate 31; light-emitting unit 32; dam body 33; light-transmitting layer 34; glass cover plate 35; support platform 210; frame glue printing roller 220; roller body 221; glue dipping block 222; up and down direction H; left and right direction L; first trough body 230; first roller assembly 240; first dipping roller 241; first liquid delivery roller 242; second trough body 250; second roller assembly 260; second dipping roller 261; second liquid delivery roller 262. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described implementation methods are only part of the implementation methods of the present application, rather than all the implementation methods. Based on the implementation methods in the present application, all other implementation methods obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0028] See also Figure 3-Figure 6 The packaging system 20 is used to package the light-emitting unit 32 of the micro display, and the packaging system 20 includes a conveying device 100, a sealant printing device 200, an optical glue injection device 300 and a capping device 400. The conveying device 100 is used to convey the substrate 31 to the workstations corresponding to the sealant printing device 200, the optical glue injection device 300 and the capping device 400, respectively, and a plurality of light-emitting units 32 are arranged on the substrate 31.

[0029] Among them, combined Figure 6 and Figure 7 As shown, the sealant printing device 200 is used to print a sealant (not shown) on the substrate 31 to form a dam 33 on the substrate 31 to surround the corresponding light emitting unit 32. Figure 8 and Fig. 9 As shown, the optical glue injection device 300 is used to inject optical glue into the inner side of the dam body 33 to form a light-transmitting layer 34 covering the light-emitting unit 32 on the inner side of the dam body 33. Fig.10 As shown, the covering device 400 is used to obtain the glass cover plate 35 and cover the glass cover plate 35 on the substrate 31 to cover the dam body 33 and the light-transmitting layer 34 .

[0030] By the above method, compared with the scribing coating method, the technical solution of the present application can form the dam 33 on the substrate 31 more quickly by printing the frame sealant, thereby improving the forming efficiency of the dam 33. In this way, the packaging system 20 can produce micro displays at a faster rate.

[0031] Alternatively, if Figure 4-Figure 7 As shown, the sealant printing device 200 includes a support platform 210 and a sealant printing roller 220 .

[0032] The support platform 210 is used to support the substrate 31 . The sealant printing roller 220 is used to print the sealant on the substrate 31 to form a dam 33 on the substrate 31 to surround the corresponding light emitting unit 32 .

[0033] Specifically, the sealant printing roller 220 includes a roller body 221 and a plurality of sealant blocks 222. The sealant blocks 222 are protrudingly arranged on the periphery of the roller body 221. The sealant blocks 222 are fully enclosed. The sealant blocks 222 are used to dip the sealant and print the sealant on the substrate 31 to form a dam body 33 surrounding the corresponding light-emitting unit 32.

[0034] In the above manner, the roller body 221 drives the glue dipping block 222 to roll the substrate 31, so that the frame sealing glue dipped on the glue dipping block 222 can be transferred to the substrate 31 to form a corresponding dam body 33 to surround the corresponding light-emitting unit 32. In this way, compared with the line coating method, the frame sealing glue can be coated on the substrate 31 at a faster rate to form the corresponding dam body 33 by using multiple glue dipping blocks 222 on the roller body 221 for relief printing, thereby improving the molding efficiency of the dam body 33.

[0035] By way of example and not limitation, the fully enclosed shape includes but is not limited to a rectangle, triangle, quadrilateral, pentagon and other polymorphic shapes, as well as other regular or irregular shapes. Preferably, the fully enclosed shape is a shape that can be closely arranged with other shapes that are congruent to itself to form a mosaic shape, but is not limited thereto.

[0036] In particular, if Figure 1 As shown, the existing dam body 14 is formed by scribing and coating with a glue dispensing needle 11, and there are at least three problems as follows. First, the glue dispensing needle 11 is prone to clogging during the scribing and coating process, resulting in glue shortage and glue breakage. The resulting poor glue discharge will affect the sealing performance of the dam body 14 formed by the scribing and coating, and further lead to packaging failure. Second, when the glue dispensing needle 11 is performing scribing and coating, the glue coating accuracy of the glue dispensing needle 11 is prone to deviation when it moves. Third, the glue coating time of scribing and coating is relatively long. When the colloid coated on the substrate 12 is not attached to the glass cover for a long time, it is easy for the colloid to overflow due to the flow of the colloid, thereby reducing the yield of the station.

[0037] However, in the technical solution of this application, Figure 6 and Figure 7 As shown, since the glue dipping block 222 is used to transfer the sealing glue by letterpress printing to form the dam body 33, at least the following three effects are achieved. First, the printing accuracy of letterpress printing can meet the molding requirements of the dam body 33. Second, letterpress printing has a high yield rate and is not prone to glue coating accuracy deviation. Third, letterpress printing can print the colloid in one-time alignment, improve glue coating efficiency, reduce glue coating time, and thus avoid or reduce glue overflow and improve the yield rate of the station.

[0038] The glue dipping block 222 is integrally or separately arranged with the roller body 221. Figure 5As shown, the glue block 222 is integrally formed with the roller body 221 to realize the integrated setting of the glue block 222 and the roller body 221. Optionally, in another example (not shown), the sealant printing roller 220 includes a cylinder (not shown), the cylinder is detachably sleeved on the roller body 221, and the glue block 222 is protrudingly arranged on the outer circumference of the cylinder to realize the separate setting of the glue block 222 and the roller body 221. In this way, the glue block 222 can be replaced together by replacing the cylinder.

[0039] Furthermore, if Figure 4 and Figure 6 As shown, the sealant printing roller 220 has an up-down direction H and a left-right direction L which are perpendicular to the axial direction of the sealant printing roller 220 and perpendicular to each other. The sealant printing device 200 includes a first tank body 230 and a first roller assembly 240 .

[0040] The first tank 230 is located on one side of the sealant printing roller 220 along the left-right direction L, and is used to contain the sealant. The first roller assembly 240 is disposed between the first tank 230 and the sealant printing roller 220, and is in rolling contact with the sealant printing roller 220, and is used to dip the sealant in the first tank 230 and transfer the dipped sealant to the sealant printing roller 220.

[0041] Through the above-mentioned method, the first roller assembly 240 can be used to continuously and uninterruptedly dip the frame sealing glue in the first groove body 230, and through the rolling contact between the first roller assembly 240 and the frame sealing glue printing roller 220, the dipped frame sealing glue is continuously transferred to the frame sealing glue printing roller 220, thereby realizing uninterrupted and continuous transfer of the frame sealing glue from the first groove body 230 to the frame sealing glue printing roller 220, thereby improving the efficiency of the frame sealing glue transfer and improving the uniformity of the distribution of the frame sealing glue in the multiple dipping glue blocks 222.

[0042] Alternatively, if Figure 4 and Figure 6 As shown, the first roller assembly 240 includes a first dipping roller 241 and a first transferring roller 242 .

[0043] The axial direction of the first dipping roller 241 extends in the same direction as the axial direction of the sealant printing roller 220. The bottom of the first dipping roller 241 in the up-down direction H extends into the first groove 230 to dip the sealant. The axial direction of the first liquid delivery roller 242 extends in the same direction as the axial direction of the sealant printing roller 220. The first liquid delivery roller 242 is in rolling contact with the first dipping roller 241 and the sealant printing roller 220, respectively, and is used to receive the sealant dipped by the first dipping roller 241 and transfer it to the sealant printing roller 220.

[0044] In the above manner, when the frame sealing glue printing roller 220 and the first dipping roller 241 rotate in the same direction, and the first dipping roller 241 and the first liquid delivery roller 242 rotate in opposite directions, and the bottom of the frame sealing glue printing roller 220 rotates in a direction away from the first liquid delivery roller 242, a partial surface of the circumference of the first dipping roller 241 and a partial surface of the circumference of the first liquid delivery roller 242 can form a first liquid delivery path, and the first liquid delivery path is used to deliver the frame sealing glue in the first trough 230 to the frame sealing glue printing roller 220.

[0045] Specifically, for ease of explanation, Figure 4 For example, the contact position between the bottom of the first dipping roller 241 and the frame sealing glue in the first groove 230 is recorded as the first contact position; the rolling contact position between the first dipping roller 242 and the first dipping roller 241 is recorded as the second contact position; the rolling contact position between the first dipping roller 242 and the frame sealing glue printing roller 220 is recorded as the third position; the surface on the lower side of the line between the first position and the second position in the circumference of the first dipping roller 241 is recorded as the first liquid transfer surface; the surface on the upper side of the line between the second position and the third position in the circumference of the first liquid transfer roller 242 is recorded as the second liquid transfer surface.

[0046] Then Figure 4 For example, when the frame sealant printing roller 220 and the first dipping roller 241 rotate clockwise, and the first liquid delivery roller 242 rotates counterclockwise, the first liquid delivery surface and the second liquid delivery surface together form a first liquid delivery path to deliver the frame sealant in the first groove body 230 to the frame sealant printing roller 220.

[0047] Furthermore, if Figure 4 As shown, the top of the first dipping roller 241 in the up-down direction H protrudes out of the first slot 230, and the first liquid transfer roller 242 rolls with the top of the first dipping roller 241. In this way, the rolling contact between the first liquid transfer roller 242 and the first dipping roller 241 can be facilitated.

[0048] Alternatively, if Figure 4 As shown, the diameter of the first liquid transfer roller 242 is smaller than the diameter of the first dipping roller 241. Thus, the bottom of the first dipping roller 241 can have a sufficient circumference to fully contact the sealant in the first tank 230 to dip enough sealant.

[0049] Furthermore, if Figure 4 and Figure 6 As shown, the sealing adhesive printing device 200 includes a second tank 250 and a second roller assembly 260 .

[0050] The second tank 250 is located at the other side of the sealant printing roller 220 along the left-right direction L, and is used to contain cleaning liquid. The second roller assembly 260 is disposed between the second tank 250 and the sealant printing roller 220, and is used to dip the cleaning liquid in the second tank 250 and clean the sealant printing roller 220.

[0051] Through the above-mentioned method, the second roller assembly 260 can be used to continuously and uninterruptedly dip the cleaning liquid in the second trough body 250, and through the rolling contact between the second roller assembly 260 and the frame sealing glue printing roller 220, the frame sealing glue printing roller 220 can be continuously cleaned with the dipped cleaning liquid, thereby achieving continuous cleaning of the dipping block 222 in the frame sealing glue printing roller 220.

[0052] Furthermore, if Figure 4 and Figure 6 As shown, the second roller assembly 260 includes a second dipping roller 261 and a second transferring roller 262 .

[0053] The axial direction of the second liquid dipping roller 261 extends in the same direction as the axial direction of the sealant printing roller 220. The bottom of the second liquid dipping roller 261 in the up-down direction H extends into the second tank 250 to dip in the cleaning liquid.

[0054] The axial direction of the second liquid transfer roller 262 extends in the same direction as the axial direction of the sealant printing roller 220. The second liquid transfer roller 262 rolls in contact with the second dipping roller 261 and the sealant printing roller 220, respectively, to receive the cleaning liquid dipped by the second dipping roller 261 and clean the sealant printing roller 220.

[0055] Through the above method, when the frame glue printing roller 220 and the second dipping roller 261 rotate in the same direction, and the second dipping roller 261 and the second liquid delivery roller 262 rotate in the opposite direction, and the bottom of the frame glue printing roller 220 rotates in the direction 242 away from the first liquid delivery roller, a part of the surface of the circumference of the second dipping roller 261 and a part of the surface of the circumference of the second liquid delivery roller 262 can constitute a second liquid delivery path, and the second liquid delivery path is used to deliver the cleaning liquid in the second trough body 250 to the frame glue printing roller 220, and the remaining surface of the circumference of the second dipping roller and the remaining surface of the circumference of the second liquid delivery roller 262 can constitute a second liquid return path, and the second liquid return path is used to return the frame glue remaining on the frame glue printing roller 220 to the cleaning liquid in the second trough body 250.

[0056] Specifically, for ease of explanation, Figure 4For example, the contact position between the bottom of the second dipping roller 261 and the cleaning liquid in the second trough 250 is recorded as the fourth contact position; the rolling contact position between the second dipping roller 262 and the second dipping roller 261 is recorded as the fifth contact position; the rolling contact position between the second dipping roller 262 and the frame sealing glue printing roller 220 is recorded as the sixth position; the surface on the lower side of the line between the fourth position and the fifth position in the circumference of the second dipping roller 261 is recorded as the first liquid return surface; the surface on the upper side of the line between the fifth position and the sixth position in the circumference of the second liquid transfer roller 262 is recorded as the second liquid return surface; the surface on the upper side of the line between the fourth position and the fifth position in the circumference of the second dipping roller 261 is recorded as the third liquid transfer surface; the surface on the lower side of the line between the fifth position and the sixth position in the circumference of the second liquid transfer roller 262 is recorded as the fourth liquid transfer surface.

[0057] Then Figure 4 For example, when the sealant printing roller 220 and the second dipping roller 261 rotate clockwise, and the second liquid delivery roller 262 rotates counterclockwise, the first liquid return surface and the second liquid return surface together constitute a second liquid return path to transfer the sealant remaining on the sealant printing roller 220 back to the cleaning liquid in the second tank 250. The third liquid delivery surface and the fourth liquid delivery surface together constitute a second liquid delivery path to deliver the cleaning liquid in the second tank 250 to the sealant printing roller 220 to clean the sealant printing roller 220.

[0058] Furthermore, the top of the second dipping roller 261 in the up-down direction H protrudes out of the second tank 250, and the second transfer roller 262 rolls with the top of the second dipping roller 261. In this way, the rolling contact between the second transfer roller 262 and the second dipping roller 261 can be facilitated.

[0059] Optionally, the diameter of the second liquid transfer roller 262 is smaller than the diameter of the second dipping roller 261. In this way, the bottom of the second dipping roller 261 can have a sufficient circumference to fully contact the cleaning liquid in the second tank 250, so as to clean the residual sealing glue and dip into enough cleaning liquid.

[0060] The following combination Figure 6-Figure 10 , the packaging method of the light emitting unit 32 of the micro display is described. The packaging method of the light emitting unit 32 of the micro display includes steps S110 to S130.

[0061] Step S110: printing a sealing glue on the substrate to form a dam, wherein the dam surrounds the corresponding light-emitting unit on the substrate.

[0062] like Figure 6-Figure 7As shown, a substrate 31 may be provided, on which light-emitting units 32 are arranged in an array. The substrate 31 may be a silicon substrate 31, and the light-emitting units 32 may be OLEDs. The above-mentioned sealant printing device 200 is used to print dam bodies 33 surrounding the corresponding light-emitting units 32 on the substrate 31 in a relief printing manner corresponding to each light-emitting unit 32.

[0063] Step S120: injecting optical glue into the inner side of the dam to form a light-transmitting layer covering the light-emitting unit on the inner side of the dam.

[0064] contrast Figure 7 See also Figure 8 and Fig. 9 The optical glue is injected into the inner side of the dam body 33 using the glue dispensing needle 310 in the optical glue injection device 300 , and the optical glue is leveled and de-bubbled to form a light-transmitting layer 34 covering the light-emitting unit 32 .

[0065] Step S130: Obtain a glass cover plate and place it on the substrate to cover the frame sealant and the light-transmitting layer, and place the assembly consisting of the glass cover plate, the substrate, the dam body and the light-transmitting layer in a vacuum state so that the glass cover plate is respectively attached to the dam body and the light-transmitting layer.

[0066] Combination Fig. 9 See also Fig.10 As shown, a glass cover plate 35 can be placed on the substrate 31 to cover the dam body 33 and the light-transmitting layer 34, and the assembly consisting of the glass cover plate 35, the substrate 31, the dam body 33 and the light-transmitting layer 34 is placed in a vacuum state so that the glass cover plate 35 is respectively attached to the dam body 33 and the light-transmitting layer 34.

[0067] The above are only implementation methods of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A frame sealant printing roller, characterized in that: The frame sealing glue printing roller comprises a roller body and a plurality of glue dipping blocks; The glue dipping block is protrudingly arranged on the outer periphery of the roller body; the glue dipping block is in a fully enclosed shape; the glue dipping block is used to dip the frame sealing glue and print the frame sealing glue on the substrate; Wherein, a plurality of light-emitting units are arranged on the substrate; and the frame sealant printed on the substrate forms a dam to surround the corresponding light-emitting units.

2. The frame sealant printing roller according to claim 1, characterized in that: The glue dipping block is integrally formed with the roller body; or, the frame sealing glue printing roller further comprises a cylinder, the cylinder is detachably sleeved on the roller body, and the glue dipping block is protrudingly arranged on the outer periphery of the cylinder.

3. A frame sealant printing device, characterized in that: The frame sealant printing device comprises: A support platform, used for supporting a substrate, on which a plurality of light-emitting units are arranged; And a frame sealing glue printing roller, the frame sealing glue printing roller is the frame sealing glue printing roller as described in claim 1 or 2, the frame sealing glue printing roller is used to print frame sealing glue on the substrate to form a dam body on the substrate, and the dam body surrounds the corresponding light-emitting unit.

4. The frame sealant printing device according to claim 3, characterized in that: The frame sealant printing roller has an up-down direction and a left-right direction which are perpendicular to the axial direction of the frame sealant printing roller and perpendicular to each other, and the frame sealant printing device further includes: A first tank body, located at one side of the frame sealing glue printing roller along the left-right direction, and used for containing the frame sealing glue; And a first roller assembly is arranged between the first slot body and the frame-sealing glue printing roller and in rolling contact with the frame-sealing glue printing roller, and is used for dipping the frame-sealing glue in the first slot body and transferring the dipped frame-sealing glue to the frame-sealing glue printing roller.

5. The frame sealant printing device according to claim 4, characterized in that: The first roller assembly comprises: a first dipping roller, wherein the axial direction of the first dipping roller extends in the same direction as the axial direction of the sealant printing roller; a bottom of the first dipping roller in the up-down direction extends into the first groove body to dip the sealant; And a first liquid transfer roller, the axial direction of the first liquid transfer roller extends in the same direction as the axial direction of the frame-sealing glue printing roller; the first liquid transfer roller is in rolling contact with the first dipping roller and the frame-sealing glue printing roller respectively, and is used for receiving the frame-sealing glue dipped by the first dipping roller and transferring it to the frame-sealing glue printing roller.

6. The frame sealant printing device according to claim 5, characterized in that: The top of the first dipping roller in the up-down direction protrudes out of the first groove body, and the first liquid transfer roller is in rolling contact with the top of the first dipping roller.

7. The frame sealant printing device according to claim 4, characterized in that: The frame sealant printing device also includes: A second tank body is located at the other side of the sealing glue printing roller along the left-right direction and is used for containing cleaning liquid; and a second roller assembly, which is arranged between the second tank body and the frame-sealing adhesive printing roller and is used for dipping the cleaning liquid in the second tank body and cleaning the frame-sealing adhesive printing roller.

8. The frame sealant printing device according to claim 7, characterized in that: The second roller assembly comprises: a second dipping roller, wherein the axial direction of the second dipping roller extends in the same direction as the axial direction of the sealant printing roller; a bottom portion of the second dipping roller located in the up-down direction extends into the second tank body to dip in the cleaning liquid; And a second liquid transfer roller, the axial direction of the second liquid transfer roller extends in the same direction as the axial direction of the frame-sealing glue printing roller; the second liquid transfer roller is in rolling contact with the second dipping roller and the frame-sealing glue printing roller respectively, and is used for receiving the cleaning liquid dipped by the second dipping roller and cleaning the frame-sealing glue printing roller.

9. The frame sealant printing device according to claim 8, characterized in that: The top of the second dipping roller in the up-down direction protrudes out of the second groove body, and the second liquid transfer roller is in rolling contact with the top of the second dipping roller.

10. A packaging system, characterized in that: The packaging system is used to package the light-emitting unit of the micro display, and the packaging system includes a conveying device, a frame sealing glue printing device, an optical glue injection device and a capping device; the frame sealing glue printing device is the frame sealing glue printing device according to any one of claims 3 to 9; The conveying device is used to convey the substrate to the workstations corresponding to the frame sealant printing device, the optical glue injection device and the capping device respectively, and a plurality of light-emitting units are arranged on the substrate; Among them, the frame sealing glue printing device is used to print frame sealing glue on the substrate to form a dam body on the substrate, and the dam body surrounds the corresponding light-emitting unit; the optical glue injection device is used to inject optical glue into the inner side of the dam body to form a light-transmitting layer covering the light-emitting unit on the inner side of the dam body; the covering device is used to obtain a glass cover plate and cover the glass cover plate on the substrate to cover the dam body and the light-transmitting layer.

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